This character is a Format and is mainly used in the Arabic script. It is also used in the scripts Syriac, Thaana.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written as Arabic letter from right to left. When changing direction it is not mirrored. U+061C prohibits a line break before it.
The Wikipedia has the following information about this codepoint:
The Arabic letter mark (ALM) is a non-printing character used in the computerized typesetting of bi-directional text containing mixed left-to-right scripts (such as Latin and Cyrillic) and right-to-left scripts (such as Persian, Arabic, Syriac and Hebrew).
Similar to the right-to-left mark (RLM), it is used to change the way adjacent characters are grouped with respect to text direction, with some difference on how it affects the bidirectional level resolutions for nearby characters.
Representations
System
Representation (click value to copy)
Nº
1564
UTF-8
D8 9C
UTF-16
06 1C
UTF-32
00 00 06 1C
URL-Quoted
%D8%9C
HTML hex reference
؜
Wrong windows-1252 Mojibake
؜
abbreviation
ALM
Encoding: GB18030 (hex bytes)
81 31 82 38
RFC 5137
\u'061C'
Bash and Zsh inside echo -e
\u061C
C and C++
\u061C
C#
\u061C
CSS
\00061C
Excel
=UNICHAR(1564)
Go
\u061C
JavaScript
\u061C
Modern JavaScript since ES6
\u{61c}
JSON
\u061C
Java
\u061C
Lua
\u{61C}
Matlab
char(1564)
Perl
"\x{61C}"
PHP
\u{61c}
PostgreSQL
U&'\061C'
PowerShell
`u{61C}
Python
\u061C
Ruby
\u{61c}
Rust
\u{61c}
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